I don't wanna be that guy that breaks your bubble. But you are not talking to her majority of the time. "She" runs a three account on onlyfans alone, she's fairly active on her multiple reddit and twitter and fansly accounts. I promise you with my life that she is not answering 95% of the messages she gets on these platforms.
These popular girls like Blinkx gets hundreds upon hundreds of messages DAILY, with all kinds of nasty things in their DM's. Not only is it mentally draining for one girl alone, it's not very good for her in the long term due to burnouts etc. But most of these girls have hired 3rd party companies that do all the talking for them. I've seen and read that these companies likes to hire gay males to do the talking. If not from a company It could aswell be her boyfriend/ husband doing all of the talking, it's not uncommon at all.
In the end of the day, who I'm to tell you what to do. As long as you believe it's her and that you're happy and tthat you are not hurting anyone, I don't see any problems. Just make sure that you understand that you will never have any real life relationship with these girls, it's not a fairy tale.
I personally like to spend money on pretty girls and jerk off and call it the day, but that's just me.